If your ok sharing how old are you and what country are you in? It varies drastically for age and country

I highly recommend going to Aspect for a diagnosis, they did mine and were wonderful. You can get an appointment without your doctor, but I warn you it can cost anywhere between 500 and 2,000. But they write your diagnosis with the NDIS in mind, depending on the level you get it makes it easier to get a package

I've been dealing with this since I was 2. The best way I've done it was either write it down bringing someone with that I can trust I can communicate for me or just flat out tell them even if they're not willing to listen